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This is your Heater Control Valve But I am going to explain what it does. First of all the "wire" you see is actually a vacuum line, it's a hollow (hopefully) air-tight tube that passes vacuum to the Heater Control Valve. The heater control valve is a vacuum actuated valve that in the open position allows fluid to pass through and in the closed position ...


There is nothing inherently wrong with what the service manager told you. (As an aside, service managers and mechanics are looking for add-on work. They get paid more money for this work than work you bring to them to do. If he says it's not a problem, believe them, because if they could make some money off of you, they'll do it.) If it serves your peace of ...

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